Justus h



(No Model.)

J. H. RUDOLPH.

REVERSIBLE BLAGKBOABD.

No. 301,392. Patente J uly 1, 1884.

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"UNITED STATES;

PATENT macs.

JUSTUS H. RUDOLPH, OF NEXV YORK, N. Y., ASSIGNOR TO THE SPECIALTY MANUFACTURING COMPANY, OF SAME PLACE.

REVERSIBLE BLACKBOARD.

SPECIFICATION forming part of Letters Patent No. 301,392, dated July 1, 1884.

Application filed October 23, 1883.

To wZZ whom it may concern.-

Be it known that I, JUsrUs H. RUDOLPH, of New York, in the county of New York and State of New York, have invented a new and useful Improvement in Slates and Blackboards and Ido hereby declare that the following is a full, clear, and exact description of the same.

My invention relates to blackboards, and has for its object to simplify and cheapen the general construction of such articles, as the blackboards commonly used are very heavy and clumsy, and inmost cases it is necessary to secure them rigidly in place upon the Wall when a surface of considerable extent is required.

My invention consists in a reversible rack or crayon-holder, adapted to be used as such on both sides of the blackboard and,further, in the improved construction of my blackboard in all its parts, as hereinafter fully described and claimed.

In the drawings, Figure l is a side elevation of a portable blackboard with my improvements.

Fig. 2 is a section 011 line as x of Fig. 3. Fig. 3 is a front view. Fig. 4 is a modification representing a wallboard embodying my improvements. Fig. 5 also represents a separate view ofa modification.

The frame A of the blackboard, as shown in Fig. 3, is composed of side strips, 1 1, which are preferably mortised into top and bottom strips, 2 2, the ends ofwhich extend a little beyond the side strips to improve the appear ance. Above the top strip, 2, and below the ends of theside strips,1, I place another strip, 3, and support it upon the strip 2 by blocks l 4, to which it may be nailed, the strip 2 being secured to said blocks in a like manner. Under the bottom strip, 2, I place a strip simi lar to that just described, and secure it in the some way. Within the space formed by the strips 112 2 isplaced the material composing the board, it being either of slate or composition, and fitting snugly therein, where it may be held by beads, as shown, or in any other well-known way.

The arrangement of the legs is shown in Fig. 1. These consist of long andshort'legs, (marked, respectively, 6 6 and 7 7.) The long legs 6 6 (No model.)

are pivoted upon the outside of the sidepieces, 5o 1 1, at a suitable height, by means of screws passing through the said legs and entering the frame of the board. The short legs 7 7 are hinged to the legs 6 6 at the point 8 in such a manner as to closeup against such legs when desired. These legs 7 7 are also secured to the lower ends of extension pieces 5 5 or" the side pieces of the frame by means of screws 9 9, which pass through slots 10 in said extensions and enter the legs at the point 11, the said slots 10 permitting the slight vertical movement of the screws or pins 9 9 when the legs are being folded.

The crayon or pencil holder is shown more particularly in Fig. 2. It consists of two light pieces of any suitable wood joined at right an gles and closed at the end. It may have a rod of wood or metal running along the bottom and journaled in bearings within the extensions 5 '5 of the side pieces below the strengthening-pieces 3, so as to'allow an easy movement thereon; or it may be hung on pins proj ecting from the extensionpieces of the frame. This construction is adapted to be used with a board having two faces, or blacked on both sides, and enables the operator to turn the holder on its pivots to whicheverside he may be writing upon.

In Fig. 4 I have represented a wall-board having my improvements. The frame of this 89 board is similar in all respects to the form just described,with the exception of the extensionpieces,which are not necessary inthis case, as no legs are necessary, the board being adapted to be supported against the wall. The 8 5 pocket or crayon-holder in this case is pivoted upon screws passing through the side pieces and entering the ends of the holder. This holder is also made double, as in the former case, and can be used for the same purpose 90 upon either side of the board. When used upon one side, the upright portion fits closely against the back of the frame, and is entirely out of the way, to all practical purposes.

.When it is desired to use my holder upon 5 stationary wall-boards, or boards blacked upon one side only, I form my holder as shown in Fig. 5, taking only one -half of the holder before described, and pivoting it in the manner shown in the figure, so that the holder, when not in use, may be folded up against the frame, out of the way.

It will be observed that the different parts of my improved slate-frame are mortised together, which is a very economical as well as durable way, and it dispenses with the use of glue, 850., which is objectionable in such devices, as it is liable to become wet by the use of the sponge in cleaning the slate, and thereby lose its binding effect.

The described arrangement ofv thd legs in the form first alluded to is very simple and effective, and allows the front or short legs to fold up against the sides of the frame and in line with it, and the back or long legs fold up against these short legs, making a very coinpact device when folded, and capable of being stowed away in a very small space.

Having thus described my invention, what I claim is In testimony whereof I have signed my name 3 5 to this specification in the presence of two subscribing witnesses.

J USTUS H. RUDOLPH.

Witnesses:

BENJ. M. SHAuM, WM. H. ALDEN, J r. 

